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A-Wall
Samba Member
Joined: March 03, 2010
Posts: 267
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 Posted: Mon May 03, 2010 11:41 pm Post subject: 30Pict-3 help |
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i think i have the wrong jets in my 30pict-3. seems to be running rich
what are the stock jet sizes supposed to be?
also my carb doesn't have that electric idle fuel shut off nor does it have a provision for one. all of the pics i've seen of 30-3's have this shut off solenoid.
what is my carb originally from then?
here are some pics, i know, i know. i wont be using this air filter for long, im looking for an oil bath as we speak. so other then that air filter the engine is a totally bone stock 1600sp with the 205T distributor.
Any help would be great.
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keifernet
Samba Search & Rescue
Joined: May 11, 2002
Posts: 19395
Location: Samba Center for Behavioral Science
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| Posted: Tue May 04, 2010 7:25 am Post subject: |
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First off you have the vacuum hose connected to the wrong port. The hose needs to go the one on the left side of the carb.
Change that and re set the timing.
As far as stock jetting on a 30 pict -3
They had a very small main jet on that particular model.
112.5 main
125Z air
jet on the right side of the carb at an angle is a 65 and the 30 pict -3 should have a unique electric solenoid straight in the RH side that has a bullet shaped tip and a very large hole and is marked "1.8"
However many time it's not there and some one has replaced with either a different electric solenoid with a "55" jet tip or put in a plain old brass pilot jet. This causes the carb tuning on a 30 pict -3 to be... let's just say not what the factory intended. |
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A-Wall
Samba Member
Joined: March 03, 2010
Posts: 267
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| Posted: Tue May 04, 2010 8:10 am Post subject: |
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really, when i had the line hooked up to the port i was getting hardly any advance when i would rev it. ill have to try it again.
im going to check my jet numbers today. and report back.
so the cutoff solenoid would be on the right hand on this one? most ive seen are on the left hand side and the mixture screws are in a different configuration to make room for it.
thanks! |
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A-Wall
Samba Member
Joined: March 03, 2010
Posts: 267
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| Posted: Tue May 04, 2010 8:31 am Post subject: |
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ok so you seem to be the carb man around here. i found a great thread that you posted in that showed me everything and explained the wierd changes of this carb over the years.
mine is exactly this
someone clearly plugged the hole for the elec cut-off on mine.
are these cut-offs easy to find for this particular carb? being that it comes off the RH side.
thanks |
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A-Wall
Samba Member
Joined: March 03, 2010
Posts: 267
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| Posted: Tue May 04, 2010 2:04 pm Post subject: |
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ok so here's what's in my carb
127.5 main jet!
125 air
65 on the angle
and a 60 of the same style threaded in my cut-off port!
awesome... |
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keifernet
Samba Search & Rescue
Joined: May 11, 2002
Posts: 19395
Location: Samba Center for Behavioral Science
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| Posted: Tue May 04, 2010 2:39 pm Post subject: |
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| A-Wall wrote: |
ok so here's what's in my carb
127.5 main jet!
125 air
65 on the angle
and a 60 of the same style threaded in my cut-off port!
awesome... |
Despite the "theory" involved sticking a 127.5 main in a 30 pict 3 IMHO and experience is a mistake.
The specific style of the electromagnetic cut off jet/valve for 30 pict 3 is hard to find and there is NO new source I have ever seen.
It acts more of an "air bypass cut off" on the 30 pict -3 than an "idle PILOT jet cut off,( like it's earlier cousins the 30 pict -1 and 30 pict -2 have) and that is why it has the "larger" hole/orifice and shape.
30 pict 3 was an emissions based carb ( 1970, VW was trying anything to appease the USA/EPA standards to continue to sell HUNDREDS of THOUSANDS of year model vehicles... they had no choice) it is an "odd duck"... not quite to the 34 pict -3 stage of design and really ( in the USA a ONE YEAR ONLY carb)
It is possible to drill out a pilot jet larger to compensate... 1.8MM is much bigger than .55MM so... figure that.
There are reasons I have come to not care for 30 pict -2 and 30 pict -3 carbs over the years... IMHO you'd be better off with a different carb.
30 pict -1 or an H30/31 |
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A-Wall
Samba Member
Joined: March 03, 2010
Posts: 267
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| Posted: Tue May 04, 2010 2:48 pm Post subject: |
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lovely...
so say i stick with this carb for now, should i put a 112.5 main back in and track down the proper cut-off?
trying to understand what your saying about drilling out a pilot jet, i assume the electric one is 1.8mm and just shoving a .60 pilot in there will restrict my fuel at idle?
also, cip1 has 2 electric cut off's. i thought this one looked promising.
https://www.cip1.ca/ProductDetails.asp?ProductCode=VWC-058-129-413-D
thanks for the help |
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keifernet
Samba Search & Rescue
Joined: May 11, 2002
Posts: 19395
Location: Samba Center for Behavioral Science
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| Posted: Tue May 04, 2010 3:23 pm Post subject: |
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| A-Wall wrote: |
lovely...
so say i stick with this carb for now, should i put a 112.5 main back in and track down the proper cut-off?
trying to understand what your saying about drilling out a pilot jet, i assume the electric one is 1.8mm and just shoving a .60 pilot in there will restrict my fuel at idle?
also, cip1 has 2 electric cut off's. i thought this one looked promising.
https://www.cip1.ca/ProductDetails.asp?ProductCode=VWC-058-129-413-D
thanks for the help |
VWC-058-129-413-D
Nope... that's the one for the other carbs ( 30 pict -1, 30 pict -2) BUT NOT 30 pict 3...
If you e mail me I'll get in touch with you and give you more details and options... it's hard to explain this about the 30 pict 3 in a few posts...
Also the pics are not great ( I will try to get better shots later) but I posted some in my gallery of the two styles. |
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wbrown45
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Joined: July 08, 2008
Posts: 1318
Location: ada, ok
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| Posted: Tue May 04, 2010 5:58 pm Post subject: |
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Please, please, move that filter out of the engine compartment and get some German braided fuel hose. At least carry a "big" fire extinguisher with you at all times.
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A-Wall
Samba Member
Joined: March 03, 2010
Posts: 267
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| Posted: Tue May 04, 2010 6:12 pm Post subject: |
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| wbrown45 wrote: |
| Please, please, move that filter out of the engine compartment and get some German braided fuel hose. At least carry a "big" fire extinguisher with you at all times. |
calm down, nothing in that picture is the way it is now, i just used this pic for reference. |
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RA 70
Samba Member
Joined: May 16, 2009
Posts: 1092
Location: Sacramento
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| Posted: Tue Sep 07, 2010 7:39 am Post subject: |
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| keifernet wrote: |
| A-Wall wrote: |
ok so here's what's in my carb
127.5 main jet!
125 air
65 on the angle
and a 60 of the same style threaded in my cut-off port!
awesome... |
Despite the "theory" involved sticking a 127.5 main in a 30 pict 3 IMHO and experience is a mistake.
The specific style of the electromagnetic cut off jet/valve for 30 pict 3 is hard to find and there is NO new source I have ever seen.
It acts more of an "air bypass cut off" on the 30 pict -3 than an "idle PILOT jet cut off,( like it's earlier cousins the 30 pict -1 and 30 pict -2 have) and that is why it has the "larger" hole/orifice and shape.
30 pict 3 was an emissions based carb ( 1970, VW was trying anything to appease the USA/EPA standards to continue to sell HUNDREDS of THOUSANDS of year model vehicles... they had no choice) it is an "odd duck"... not quite to the 34 pict -3 stage of design and really ( in the USA a ONE YEAR ONLY carb)
It is possible to drill out a pilot jet larger to compensate... 1.8MM is much bigger than .55MM so... figure that.
There are reasons I have come to not care for 30 pict -2 and 30 pict -3 carbs over the years... IMHO you'd be better off with a different carb.
30 pict -1 or an H30/31 |
My experience with sticking in 127.5 main in my 30 pict-3 was my engine running hot (1600 with Scat C25 cam, stock 205T distributor, 65 pilot, 125z air correction, and at sea level). I had changed from the stock 112.5 to the 127.5 over this winter, and it ran well. Then the weather warmed up into the mid 70's and it was running hot which also caused my oil pressure to drop. (Plugs also indicating rich) I switched to a 125 main and the temps seem to have gone way down, and the oil pressure is up to 12-15 at idle. I am thinking about trying a 120 main. Now my question is what "should" in theory be the ideal main jet in the 30 pict-3 at sea level? |
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avocado_tom
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Joined: June 18, 2007
Posts: 235
Location: Pittsburgh, PA
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| Posted: Wed Sep 28, 2011 8:21 am Post subject: |
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| RA 70 wrote: |
My experience with sticking in 127.5 main in my 30 pict-3 was my engine running hot (1600 with Scat C25 cam, stock 205T distributor, 65 pilot, 125z air correction, and at sea level). I had changed from the stock 112.5 to the 127.5 over this winter, and it ran well. Then the weather warmed up into the mid 70's and it was running hot which also caused my oil pressure to drop. (Plugs also indicating rich) I switched to a 125 main and the temps seem to have gone way down, and the oil pressure is up to 12-15 at idle. I am thinking about trying a 120 main. Now my question is what "should" in theory be the ideal main jet in the 30 pict-3 at sea level? |
Was that a 1600 SP or DP?
And did you ever try moving down to the 120 main? |
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RA 70
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Joined: May 16, 2009
Posts: 1092
Location: Sacramento
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| Posted: Fri Sep 30, 2011 8:02 am Post subject: |
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| SP and no, I now have dual weber ict's. I also changed to a doghouse cooler. |
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Teeroy 
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Joined: April 20, 2003
Posts: 3685
Location: Eastern WA
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| Posted: Fri Sep 30, 2011 3:55 pm Post subject: 30Pict-3 help |
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Here is a picture that shows the correct idle jet (top one) next to the other style.
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lee griffiths
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Joined: February 02, 2004
Posts: 229
Location: Manchester, UK
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| Posted: Wed Nov 26, 2014 4:21 pm Post subject: |
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Hi,
Just reviving this thread.
When you screw the idle cut-off jet/solenoids into the carb body should the chamfered end of the jet screw home to the carb body thus leaving some gap and possibly visible thread?
I'm rebuilding a 30 Pict-2 carb on my '68 bus and the idle solenoid (which looks like the second one in the photo) had some alloy washers on the threaded section so that the washers hit the carb body maybe before the jet end seated in the hole. Not sure why the PO put the washers on... maybe fuel was seeping out along the thread.. ?
thanks
Lee
'58 Mango
'68 Devon Camper
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72 Westfalia Campmobile Type 4 1700 |
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kreemoweet
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Joined: March 13, 2008
Posts: 3899
Location: Seattle, WA
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| Posted: Wed Nov 26, 2014 6:07 pm Post subject: |
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No washers. Just like the later 34-PICT pilot jets, it's supposed to screw in just until the tip seats over
the orifice inside the carb.
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HRVW
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Joined: May 01, 2011
Posts: 2531
Location: Rosarito, Mexico
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| Posted: Wed Nov 26, 2014 11:55 pm Post subject: |
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 Those washers were to keep the cut off valve from bottoming out that kept the engine from Idling.....I did that with the G45-65 Idle Jet on the 34-3 Carbs for yrs and would re adjust for a leaner mixture to compensate. |
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lee griffiths
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Joined: February 02, 2004
Posts: 229
Location: Manchester, UK
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| Posted: Thu Nov 27, 2014 10:40 am Post subject: |
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Ahh, so a bit of a fix then. So would having washers richen the mixture then suggesting a large idle is needed ? It might be that someone has replaced the idle solenoid with whatever they had and it's the wrong one.
The bus is a 1600 SP with 30 Pict-2. Should it be a .55 idle solenoid ?
thanks
ps, I got the engine running today after about 15 years of dry storage and it sounds good, although I didn't run it long enough to really check the idle as I was running it from a jerry can of gas (tank is all gummed up).
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72 Westfalia Campmobile Type 4 1700 |
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kreemoweet
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Location: Seattle, WA
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| Posted: Thu Nov 27, 2014 1:12 pm Post subject: |
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Washers might also indicate that the cutoff plunger was inoperative, and keeping
it unseated was a workaround. All the 30 PICT-2 specs I have call for a 0.55 mm orifice.
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easy e
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